Advertising novelty.



W. H. KNOBLOCH.

ADVERTISING NOVELTY. APPLICATION HLED 1AN.23.1914.

1, 152,028. Patented Aug. 31, 1915.

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WILLIAM IH. xNoBLOCH, OF` DETROIT, MICHIGAN, AssIGNon ToV NORTHWAY MOTOR. ,a MANUFACTURING COMPANY, OF DETROIT, MICHIGAN, A CORPORA- TION OF MICHIGAN.

ADVERTISINGINOVELTY.

Application flied January 23, 1914. ySerial No. 813,913.

To all whom it may concern Be it known that I, WILLIAM H. KNOB- LOCH, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in-Advertising Novelties, of which the fol lowing is a specification, reference being had therein to the accompanying drawings.

The invention relates to advertising novelties and more particularly to a device intended for use in connection with the sale of automobiles and accessories.

It is the object of the invention to obtain a simple and inexpensive construction of calculating instrument which enables the user to solve various problems in connection with motor cars and without mathematical knowledge or engineering skill.

The average user of an automobile or other motor car is neither an engineer nor a mathematician. There are, however, various problems which arise in connection with the use of his car which require calculation and which would be advantageous for him to solve without assistance. For instance, he may wish to know the mileage per hour that may be obtained from a determined number of revolutions per minute of the engine or motor with a given ratio of gear reduction and a given diameter of drive wheel; again, he may wish to know the piston displacement of his engine where the diameter of the cylinder bore and the length of stroke are known; or the number of revolutions per minute of the motor resulting from a given piston speed. All such problems can be quickly solved by an engineer but not by many a user of the car. I have therefore devised a construction of Vernier or slide-rule with selected datas so arranged that the desired results may be read in actual figures instead'of making use of logarithims as is usual. This device is so constructed that advertising matter-as for instance, the name of a manufacturer of automobiles or accessories, may be placed' thereon. Furthermore the construction is so simple'and inexpensive that the device may be given away, and on account of its utility will be widely distributed.

In the drawings: Figure 1 is an elevation of one side of the instrument; Fig. 2 is a similar view of the reverse side; and Fig. 3 is a sectionalrperspective view.

A, B and C are three bars or strips of wood, paper or anyother suitable material, upon which the scales, figures and other matter may be printed.

1 and D are sheets of transparent material, such as Celluloid, which are pasted or otherwise secured to the outer strips A and C upon opposite sides thereof, and formlng therebetween a groove E in which the strip B slides. As specifically constructed the strip A has printed upon one side and on the left-hand end, as shown in Fig. 1, graduations and gures corresponding to the cylinder bore, as indicated at F. On the right-hand end of the same strip and on the same side are graduations and figures corresponding to piston displacement, as indicated at Cr. The strip C upon the same side and as shown in Fig. 1, has on its left-hand end graduations and figures corresponding to piston speed, indicated at H, and on the right-hand end corresponding markings representing revolutions per minute of the motor, as indicated at I. The slidable strip B has marked thereon graduations and figures representing the stroke of the piston, which may be Variably registered with the graduations J on the strips A and D. On the reverse side of the instrument, as shown in Fig. 2, the strip A has markings K representing revolutions per minute of the motor; the strip C markings L representing miles per hour; while the intermediate strip B has adjacent to the strip A markings M representing gear reduction, and adjacent to the strip C markings N representing wheel diameter. In addition to these markings there is space upon the strips for piinted advertising matter, as indicated at O.

With the device constructed as described in use, if it is desired to ascertain the piston displacement, given the cylinder bore and stroke of the piston, the slide B is adjusted to register the line P thereon with the particular marking F corresponding to the cylinder bore. The marking J, correspond to the stroke of piston, is then selected and the reading taken from the adjacent marking G which represents the piston displacement. In the same manner the rotations per minute of motor may be determined with the two variables piston speed and piston stroke, by a similar adjustment of the strip B to register the line P with the markings H. Upon the re- Specication of Letters Patent. Patented Aug, 31, 1915, j

verse side of the instrument, shown in Fig. 2, there are three variables entering into the calculation, as for insta-nce rotations r minute ofP motor, gear reduction 'and whe'el diameter, which by a suitable adjustment-of the strip B will give a direct reading of the result in miles per hour.

t is obvious that various other calculations can be made by the instrument, which it is unnecessary to explain. To calculate the piston displacement 'with different numbers of 4engine cylinders, additional lines, such as P2 and I, may be placed upon the adjustable strip B.

What I claim as my invention is:

1. An advertising novelty, comprising a slide rule having a fixed strip and a movable strip, each of said strips being provided With a pair of scales correspondinl arranged thereon, each representing ig ferent factors, the scales on one strip being adapted to coperate with the scales respectively corresponding thereto on the other strip, all of said scales being employed for the direct reading of a result.

2. An, advertising novelty, comprising a slide rule having a fixed and a slide member, a scale representing cylinder bore on said fixed member, a scale on said slide member representing number of cylinders adapted to coperate with said irst-mentioned scale, another scale on said slide member representing stroke, and a second scale on said fixed member re resenting pis'- ton displacement, said scale eing adapted to coperate with said last mentioned scale on the slide member, all of said scales being employed in determining the result.

3. An advertisingV novelty, com rising a slide rule having co erating` xed and slide members, and sca es on opposite ends of said members, the `scales on corresponding ends of said members being ad]acent and ada ted to coperate with each other in all positlons of working adjustment of said fixed and slide members.

In testimony whereof I aiiix my signature in presence of two witnesses.

WILLIAM H. KNOBLOCH. Witnesses:

WM. J. BELKNAP, HENmm'rA E. BOWMAN. 

